Mantua Hall at 35th and Fairmount, one of the original 40 high-rise public housing towers built as part of the city's urban-renewal era, was imploded this weekend. It was the 21st such tower that the Philadelphia Housing Authority has imploded since 1995. The end of the building is considered a new beginning for Mantua. But the scandal involving the Department of Housing and Urban Development and the Philadelphia Housing Authority could lead to the flow......